﻿C84 
  report 
  of 
  commissioner 
  of 
  Flsfl 
  and 
  fisheries. 
  [80] 
  

  

  PENiEID^!. 
  

  

  SiCYONIA 
  BREVIROSTRIS 
  StimpSOn. 
  

  

  Sicyonia 
  cristata 
  Saussure, 
  Crust. 
  Antilles 
  et 
  Mexique, 
  p. 
  55, 
  pi. 
  3, 
  fig. 
  25, 
  1858 
  

  

  (not 
  of 
  De 
  Haau). 
  

   Sicyonia 
  hrevirostris 
  Stimpson, 
  Ann. 
  Lyceum 
  Nat. 
  Hist. 
  New 
  York, 
  x, 
  p. 
  132, 
  

  

  1871. 
  

  

  Station 
  2296, 
  October 
  20, 
  off 
  Cape 
  Hatteras, 
  north 
  lat. 
  35° 
  38' 
  20", 
  

   west 
  long. 
  74° 
  58' 
  45", 
  27 
  fathoms, 
  coarse 
  gravel 
  and 
  sand 
  ; 
  eight 
  males 
  

   and 
  four 
  females 
  (8815). 
  

  

  ? 
  Sicyonia 
  dorsalis 
  Kingsley. 
  

  

  . 
  Proc. 
  Acad. 
  Nat. 
  Sci. 
  Philadelphia, 
  1878, 
  p. 
  97 
  (9), 
  1878. 
  

  

  Off 
  Cape 
  Hatteras 
  : 
  Station 
  2279, 
  October 
  19, 
  north 
  lat. 
  35° 
  20' 
  55", 
  

   west 
  long. 
  75° 
  20' 
  55", 
  10 
  fathoms, 
  gray 
  sand, 
  one 
  young 
  specimen 
  (8800) 
  ; 
  

   and 
  station 
  2280, 
  October 
  19, 
  north 
  lat. 
  35° 
  21', 
  west 
  long. 
  75° 
  21' 
  30", 
  

   10 
  fathoms, 
  gray 
  sand, 
  two 
  small 
  specimens 
  (7223). 
  

  

  The 
  specimens 
  agree 
  well 
  with 
  Kingsley's 
  short 
  description, 
  except 
  

   that 
  the 
  third 
  and 
  fourth 
  somites 
  of 
  the 
  pleon 
  have 
  no 
  spines 
  at 
  the 
  

   postero-inferior 
  angles. 
  

  

  Pen^jus 
  Brasiliensis 
  Latreille. 
  

  

  Specimens 
  examined. 
  

   [Locality: 
  Off 
  Cape 
  Hatteras.] 
  

  

  The 
  genus 
  Penccus, 
  as 
  usually 
  understood, 
  includes 
  species 
  which 
  dif- 
  

   fer 
  remarkably 
  in 
  the 
  structure 
  of 
  the 
  oral 
  appendages, 
  the 
  number 
  and 
  

   arrangement 
  of 
  the 
  branchiae, 
  and 
  in 
  the 
  presence 
  of 
  exopods 
  and 
  epi- 
  

   pods 
  at 
  the 
  bases 
  of 
  the 
  gnathopods 
  and 
  peraeopods, 
  but 
  I 
  have 
  recently 
  

   restricted 
  it 
  to 
  species 
  like 
  P. 
  carimonte, 
  canaliculatus, 
  Brasiliensis, 
  semi- 
  

   sulcatus, 
  setiferus, 
  and 
  stylirostris, 
  in 
  which 
  the 
  antennular 
  flagella 
  are 
  

   very 
  short 
  ; 
  the 
  distal 
  segment 
  of 
  the 
  mandibular 
  palpus 
  is 
  much 
  larger 
  

   than 
  the 
  proximal, 
  very 
  broad, 
  and 
  not 
  prolonged 
  into 
  a 
  narrow 
  tip; 
  

   the 
  endognath 
  of 
  the 
  first 
  maxilla 
  is 
  greatly 
  elongated 
  and 
  segmented 
  ; 
  

   the 
  endopod 
  of 
  the 
  maxilliped 
  is 
  slender 
  and 
  composed 
  of 
  four 
  segments, 
  

   and 
  the 
  exopod 
  is 
  lamellar 
  and 
  unsegmented 
  ; 
  both 
  pairs 
  of 
  gnathopods 
  

   have 
  well-developed 
  epipods 
  and 
  large 
  exopods; 
  all 
  the 
  perseopods 
  have 
  

   small 
  exopods, 
  but 
  only 
  the 
  first, 
  second, 
  and 
  third 
  are 
  furnished 
  with 
  

  

  